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Bathyraja mariposa, sometimes referred to as the butterfly skate,[2] is a species of skate found in the Aleutian islands.[3] It is overall a medium-brown color, lacks thorns on the disc and has indistinct thorns on the tail. It was discovered in 2002 during a National Marine Fisheries Service survey, and first described in 2004. The holotype specimen is held at the University of Washington. Its species name "mariposa" derives from the Spanish word for butterfly, although several other species are sometimes referred to as the "butterfly skate."[3][4]

Bathyraja mariposa
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Order:	Rajiformes
Family:	Arhynchobatidae
Genus:	Bathyraja
Species:	B. mariposa
Binomial name
Bathyraja mariposa D. E. Stevenson, J. W. Orr, Hoff & McEachran, 2004

Description

Bathyraja mariposa is a medium-sized skate relative to other Alaska skates, measuring approximately 0.76 meters total length. It has a lengthy snout and moderately long tail and lacks a pseudosiphon in the claspers. It is morphologically similar to two other Alaskan skates, Bathyraja violacea and Rhinoraja taranetzi, but can be distinguished based on coloration patterns. B. mariposa is green-brown on the dorsal side of the disc, with small dark brown or black blotches on disc and tail. Large yellowish blotches usually appear on the surface of the pectoral fins. The dorsal surface of the disc has uniformly dense coverage of dermal denticles.[4]

Ecology

Bathyraja mariposa has been estimated to have a population density of approximately 0.34 individuals per square kilometer in the Aleutian islands. Trawl surveys have not uncovered this species outside of that region and appears to be found principally in the central Aleutians.[5] It is believed to be benthopelagic, found in waters 90 – 448 meters deep.[3]

References

На других языках

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- [en] Bathyraja mariposa

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[es] Bathyraja mariposa

Bathyraja mariposa es una especie de peces de la familia de los Rajidae en el orden de los Rajiformes.

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[ru] Bathyraja mariposa

Bathyraja mariposa  (лат.) — бентопелагический вид хрящевых рыб рода глубоководных скатов семейства Arhynchobatidae отряда скатообразных. Обитают в умеренных водах северной части Тихого океана. Встречаются на глубине до 448 м. Их крупные, уплощённые грудные плавники образуют округлый диск со треугольным рылом. Колючки на диске отсутствуют. Окраска коричневого цвета с желтоватыми отметинами. Максимальная зарегистрированная длина 76 см. Откладывают яйца. Не являются объектом коммерческого промысла[1][2][3].

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